fix(dhcp) Avoid crash in DHCP tab of network devices

IPs and Macs are not arrays in this case

issue #6063

dhcp/admin/systems/class_dhcpSystem.inc

@@ -156,10 +156,23 @@ class DhcpHostsAttribute extends OrderedArrayAttribute
   }
 
   /* Special LDAP treatment that this attribute does after plugin ldap save */
-  function postLdapSave ($ldap, $fullrewrite, $ipchanged, array $oldips, array $newips, $macchanged, array $oldmacs, array $newmacs)
+  function postLdapSave ($ldap, $fullrewrite, $ipchanged, $oldips, $newips, $macchanged, $oldmacs, $newmacs)
   {
     global $config, $ui;
 
+    if (!is_array($oldips)) {
+      $oldips = [$oldips];
+    }
+    if (!is_array($newips)) {
+      $newips = [$newips];
+    }
+    if (!is_array($oldmacs)) {
+      $oldmacs = [$oldmacs];
+    }
+    if (!is_array($newmacs)) {
+      $newmacs = [$newmacs];
+    }
+
     if ($this->plugin->is_template) {
       return;
     }

[Ghost User]

SonarQube analysis reported 3 issues

• 3 major

Note: The following issues were found on lines that were not modified in the commit. Because these issues can't be reported as line comments, they are summarized here:

1. This function "getAttributesInfo" has 175 lines, which is greater than the 150 lines authorized. Split it into smaller functions.
2. This function "getUserValues" has 206 lines, which is greater than the 150 lines authorized. Split it into smaller functions.
3. Remove this unused "$class" local variable.